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Review
. 2005 Nov;11(11):1673-9.
doi: 10.3201/eid1111.050868.

Coltiviruses and seadornaviruses in North America, Europe, and Asia

Houssam Attoui  1 , Fauziah Mohd Jaafar, Philippe de Micco, Xavier de Lamballerie
Affiliations
Review

Coltiviruses and seadornaviruses in North America, Europe, and Asia

Houssam Attoui et al. Emerg Infect Dis. 2005 Nov.

Abstract

Coltiviruses are tickborne viruses of the genus Coltivirus. The type species, Colorado tick fever virus (from North America), has been isolated from patients with flulike syndromes, meningitis, encephalitis, and other severe complications. Another coltivirus, Eyach virus, has been isolated from ticks in France and Germany and incriminated in febrile illnesses and neurologic syndromes. Seadornaviruses are endemic in Southeast Asia, particularly Indonesia and China. The prototype virus of the genus, Banna virus (BAV), has been isolated from many mosquito species, humans with encephalitis, pigs, and cattle. Two other seadornaviruses, Kadipiro and Liao Ning, were isolated only from mosquitoes. The epidemiology of seadornaviruses remains poorly documented. Evidence suggests that BAV is responsible for encephalitis in humans. Infection with BAV may be underreported because it circulates in regions with a high incidence of Japanese encephalitis and could be misdiagnosed as this disease.

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Figures

Figure 1
Figure 1
Negative contrast electron micrographs of A) Colorado tick fever virus and B) Banna virus (BAV). C) Thin section of BAV-infected C6/36 cells showing viral particles (arrows) in vacuolelike structures.
Figure 2
Figure 2
Electropherotypes of coltiviruses and seadornaviruses on 1% agarose gels. A) Colorado tick fever virus (CTFV-Fl) and California hare coltivirus (CTFV-Ca). B) Banna virus (BAV) and Kadipiro virus (KDV).
Figure 3
Figure 3
Comparison of nucleotide and amino acid sequences of genome segments of viral proteins (VP) and dsRNA segments (S) of Colorado tick fever virus (CTFV) and Eyach virus (EYAV). NTP, nucleoside triphosphatase.
Figure 4
Figure 4
Comparison of nucleotide and amino acid sequences of genome segments of viral proteins (VP) and dsRNA segments (S) of Banna virus (BAV) and Kadipiro virus (KDV). NTP, nucleoside triphosphatase.
Figure 5
Figure 5
Phylogenetic comparison of the viral polymerase protein sequences of viruses of the family Reoviridae, including seadornaviruses and coltiviruses. Accession numbers and further details of the sequences and viruses are available in the report by Attoui et al. (8). Analysis shows coltiviruses and seadornaviruses as 2 distinct phylogenetic groups and that seadornaviruses share a common phylogenetic origin with rotaviruses (arrow). KDV, Kadipiro virus; BAV, Banna virus; LNV, Liao Ning virus; RDV, Rice dwarf virus; RDV-Ch, RDV Chinese isolate; SCRV, St. Croix River virus; AHSV, African horse sickness virus; CHUV, Chuzan virus; BTV, Blue tongue virus; GSRV, Golden shiner reovirus; GCRV, Grass carp reovirus; CSRV, Chum salmon reovirus; SBRV, Striped bass reovirus; MRV, Mammalian orthoreovirus; RRSV, Rice ragged stunt virus; BmCPV, Bombyx mori cytoplasmic polyhedrosis virus; DsCPV, Dendrolimus spectabilis cytoplasmic polyhedrosis virus; LdCPV, Lymantria dispar cytoplasmic polyhedrosis virus; NLRV, Nilaparvata luguens reovirus; CTFV, Colorado tick fever virus; EYAV, Eyach virus; CPRV, Cryphonectria parasitica reovirus; RaRv, Rotavirus A; BoRV, Bovine rotavirus; SiRV, Simian rotavirus; PoRV, Porcine rotavirus; Hu/MuRV, Human/Murine rotavirus.
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References

    1. Attoui H, Billoir F, Biagini P, de Micco P, de Lamballerie X. Complete sequence determination and genetic analysis of Banna virus and Kadipiro virus: proposal for assignment to a new genus (Seadornavirus) within the family Reoviridae. J Gen Virol. 2000;81:1507–15. - PubMed
    1. Attoui H, Mohd Jaafar F, de Lamballerie X, Mertens PPC. Seadornavirus, Reoviridae. In: Fauquet CM, Mayo MA, Maniloff J, Desselberger U, Ball LA, editors. Virus taxonomy: eighth report of the international committee on taxonomy of viruses. London: Elsevier/Academic Press; 2005. p. 504–10.
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